From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by sourceware.org (Postfix) with ESMTPS id 57A7C3858D33 for ; Fri, 31 Mar 2023 10:57:38 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 57A7C3858D33 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1680260258; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:in-reply-to:in-reply-to: references:references; bh=sJiptCACadqPH7it2SZFxMMGLneNw9mIhaKRcFIj+e8=; b=JnudUBj0CBDBdHytKPBt1fDkVXobpz6/O0+NcaTT/K+eLeu4rIrpQQFyAFGCMC2TlNg0ld xjArlK7jMtXwt3vbhpkAQGj5AcSt0dOXqW44aOge15ObbW0f6T2YF210nClicBNFEMQzf9 09/mfHJhYSRonQViLpTPv9E+7WyOkdk= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-494-9KplNIRVNq-LSj0oX_agWQ-1; Fri, 31 Mar 2023 06:57:36 -0400 X-MC-Unique: 9KplNIRVNq-LSj0oX_agWQ-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 859B6282380F for ; Fri, 31 Mar 2023 10:57:36 +0000 (UTC) Received: from tucnak.zalov.cz (unknown [10.39.192.16]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 466301402C06; Fri, 31 Mar 2023 10:57:36 +0000 (UTC) Received: from tucnak.zalov.cz (localhost [127.0.0.1]) by tucnak.zalov.cz (8.17.1/8.17.1) with ESMTPS id 32VAvXTK3974658 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Fri, 31 Mar 2023 12:57:34 +0200 Received: (from jakub@localhost) by tucnak.zalov.cz (8.17.1/8.17.1/Submit) id 32VAvXQb3974657; Fri, 31 Mar 2023 12:57:33 +0200 Date: Fri, 31 Mar 2023 12:57:33 +0200 From: Jakub Jelinek To: Aldy Hernandez , Andrew MacLeod Cc: gcc-patches@gcc.gnu.org Subject: [PATCH] range-op-float: Further foperator_{,not_}equal::fold_range fix Message-ID: Reply-To: Jakub Jelinek References: MIME-Version: 1.0 In-Reply-To: X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Spam-Status: No, score=-3.7 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NONE,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: On Fri, Mar 31, 2023 at 12:45:10PM +0200, Jakub Jelinek via Gcc-patches wrote: > - there is a missing case (not handled in this patch) where both operands > are known to be zeros, but not singleton zeros This patch adds those cases. Ok for trunk if it passes bootstrap/regtest? 2023-03-31 Jakub Jelinek * range-op-float.cc (foperator_equal::fold_range): If at least one of the op ranges is not singleton and neither is NaN and all 4 bounds are zero, return [1, 1]. (foperator_not_equal::fold_range): In the same case return [0, 0]. --- gcc/range-op-float.cc.jj 2023-03-31 11:23:04.817876083 +0200 +++ gcc/range-op-float.cc 2023-03-31 12:51:34.757480162 +0200 @@ -616,6 +616,13 @@ foperator_equal::fold_range (irange &r, else r = range_false (type); } + else if (real_iszero (&op1.lower_bound ()) + && real_iszero (&op1.upper_bound ()) + && real_iszero (&op2.lower_bound ()) + && real_iszero (&op2.upper_bound ()) + && !maybe_isnan (op1, op2)) + // [-0.0, 0.0] == [-0.0, 0.0] or similar. + r = range_true (type); else { // If ranges do not intersect, we know the range is not equal, @@ -732,6 +739,13 @@ foperator_not_equal::fold_range (irange else r = range_true (type); } + else if (real_iszero (&op1.lower_bound ()) + && real_iszero (&op1.upper_bound ()) + && real_iszero (&op2.lower_bound ()) + && real_iszero (&op2.upper_bound ()) + && !maybe_isnan (op1, op2)) + // [-0.0, 0.0] != [-0.0, 0.0] or similar. + r = range_false (type); else { // If ranges do not intersect, we know the range is not equal, Jakub